It’s very nice if you don’t have Nvidia gpu. LMDE6 might even offer better support for Nvidia since Debian 12 allowed non-free drivers.
I use LMDE5 and promise of it being faster/snappier than regular isn’t over estimated: https://forums.linuxmint.com/viewtopic.php?t=374128
During the year with LMDE5 I haven’t faced any issues with it. I tried Debian 11 for a week and even an usable Rust-package (up-to-date) was pain to install. I’m not sure, but I claim that Mint Team updates some packages into the repo by themselves.
LMDE also includes flatpaks so they’re up-do-date anyway.